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Pressurization

An imbalance in air pressure is apparent in this illustration, indicating that _________ is inducing ________. Select two words to fill in these blanks.
A. duct leakage
B. negative pressure
C. infiltration
D. positive pressure
E. increased supply fan rate

AnswerDuct leakage (A) induces infiltration (C), illustrating negative pressurization. Ensuring the supply fan rate is greater than sum of the return and infiltration rates will positively pressurize the building. Eliminating duct leaks will resolve the initial cause.
ARE 4.0 exam prep: BS

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